RSS Feed/News After updating to xf 2.3 & add new post, an error message appears

[ENXF NET]

Hi
After updating to v2.3.0 Release Candidate 4
when add new post, an error message appears

Code:

ErrorException: [E_WARNING] Undefined array key 1 in src/XF/BbCode/ProcessorAction/AnalyzeUsage.php at line 209
XF::handlePhpError() in src/XF/BbCode/ProcessorAction/AnalyzeUsage.php at line 209
XF\BbCode\ProcessorAction\AnalyzeUsage->analyzeImgTag() in src/XF/BbCode/Processor.php at line 355
XF\BbCode\Processor->analyzeTag() in src/XF/BbCode/Processor.php at line 267
XF\BbCode\Processor->renderTag() in...

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